package operation;

import book.Book;
import book.BookList;

import java.util.Scanner;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: 28956
 * Date: 2024-01-27
 * Time: 22:47
 */
public class DelOperation implements IOPeration{
    @Override
    public void work(BookList bookList) {
        System.out.println("删除图书！");
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入你要删除的图书：");
        String name = scanner.nextLine();

        int pos = -1;

        int currentSize = bookList.getUsedSize();
        int i = 0;
        for (; i < currentSize; i++) {
            Book book = bookList.getBook(i);
            if (book.getName().equals(name)){
                pos = i;
                break;
            }
        }
        if(i == currentSize){
            System.out.println("没有你要删除的图书!");
            return;
        }
        //开始删除
        int j = pos;
        for (; j < currentSize-1; j++) {
            //[j] = [j+1]
            Book book = bookList.getBook(j+1);
            bookList.setBooks(j,book);
        }
        bookList.setBooks(j,null);
        bookList.setUsedSize(currentSize-1);
        System.out.println("删除成功！");
    }
}
